LK3-B430E Mark II
9
3. MECHANICAL DESCRIPTIONS
e
w
q
t
r
y
t
u
r
w
e
q
i
3-6. Thread nipper mechanism
3-6-1. Manual operation
1. When the presser bar lifter lever
q
is turned in the direction of the arrow, the presser bar lifter crank
w
makes contact with the tension release lever
e
, pushing the tension release bar
r
.
2. The end of the tension release bar
r
pushes the pin
t
.
3-6-2. In thread trimming
1. When the thread trimming signal is received, the thread trimmer solenoid operates to push the tension
release driving lever
q
in the direction of the arrow, and the roller
w
which is attached to the tension
release driving lever
q
is positioned on the periphery of the thread trimmer cam
e
.
2. The tension release cam of the thread trimmer cam
e
moves the tension release driving lever
q
in the
direction of the arrow.
3. Tension release lever (U)
r
, which is engaged with the tension release driving lever
q
, moves in the
direction of the arrow.
4. The tension release lever (U)
r
moves the tension release lever
y
via the tension release rod assy
t
.
5. The tension release lever
y
pushes the tension release bar
u
.
6. The end of the tension release bar
u
pushes the pin
i
.